Parthenium integrifoliumL.

wild quinine

WFO wfo-0000123645 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Parthenium integrifolium, photographed by Ryan Sorrells
fig. a Ryan Sorrells, CC BY 4.0 / 2022-06-11 / obs. 205635223
Parthenium integrifolium, photographed by Brian Finzel
fig. b Brian Finzel, CC BY-SA 4.0 / obs. 202608008
Parthenium integrifolium, photographed by Eric Knight
fig. c Eric Knight, CC BY 4.0 / obs. 191907098
Parthenium integrifolium, photographed by Tom Lazar
fig. d Tom Lazar, CC0 1.0 / obs. 157249309
Parthenium integrifolium, photographed by Tom Lazar
fig. e Tom Lazar, CC0 1.0 / obs. 144757721
Parthenium integrifolium, photographed by Craig Martin
fig. f Craig Martin, CC0 1.0 / obs. 145255217
Parthenium integrifolium, photographed by Cory
fig. g Cory, CC0 1.0 / obs. 142341534
Parthenium integrifolium, photographed by Mike B
fig. h Mike B, CC BY-SA 4.0 / obs. 141191802

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Flowering n = 917 observations

Peak flowering in Jun, from 917 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 11 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Parthenium auriculatum Britton
  • Parthenium hispidum Raf.
  • Parthenium hispidum var. auriculatum (Britton ex Britton & Brown) Rollins
  • Parthenium hispidum var. hispidum
  • Parthenium integrifolium f. integrifolium
  • Parthenium integrifolium var. auriculatum (Britton) Cornelius ex Cronquist
  • Parthenium integrifolium var. henryanum Mears
  • Parthenium integrifolium var. hispidum (Raf.) Mears
  • Parthenium integrifolium var. integrifolium
  • Parthenium integrifolium var. mabryanum Mears
  • Parthenium radfordii Mears

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.